Australian Open tennis tournament

Maria Sharapova of Russia signs autographs after defeating compatriot Olga Puchkova in their women's singles match at the Australian Open tennis tournament in Melbourne, January 14, 2013.

Maria Sharapova of Russia signs autographs after defeating compatriot Olga Puchkova in their women's singles match at the Australian Open tennis tournament in Melbourne, January 14, 2013. (DAVID GRAY, REUTERS)

Maria Sharapova of Russia signs autographs after defeating compatriot Olga Puchkova in their women's singles match at the Australian Open tennis tournament in Melbourne, January 14, 2013.DAVID GRAY, REUTERS